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Re: The Soundprofessionals SP-Preamp

Subject: Re: The Soundprofessionals SP-Preamp
From: "Klas Strandberg" klasstrandberg
Date: Tue Feb 20, 2007 4:33 pm ((PST))
Great! Have you had any problems with it self-oscillating when distorting?
My sample does.

Klas.

At 00:29 2007-02-21, you wrote:
>I have this preamp and have used it for about a year in the field and
>it has proven pretty rugged.  The switch has not broken...I haven't
>even worried about it.
>
>I usually leave the switch on low gain and the knob turned up to full.
>  This seems to give me the best noise/headroom situation.
>
>Danny
>
>--- In  Klas Strandberg <>
>wrote:
> >
> > Hi!
> >
> > I've had a look at the SP-Preamp from Soundprofessionals.com. They
> > offer it for 159USD and says this is 100 USD below retail price.
> >
> > Obviously good with it:
> > Nice box, nice belt clip, - stereo, low noise, good pip voltage, low
> > current consumption (8mA), small, easy to handle. It's perfect for
> > the user of low noise PIP-mic's, MT24/96 and Edirol R-09.
> > It can also drive headphones with enough juice, at least my 250 Ohm
>ones.
> >
> > Questionable:
> > The box is not shielded, neither are the cables inside. There should
> > be a note (like in the Telinga manual...) saying: "This preamp should
> > be connected to battery operated equipment only."  Indoors, connected
> > to a mains operated recorder, you will get mains hum.
> >
> > The on/off switch will break. It is a only about 1 mm thick "finger"
> > pointing out about 6 mm above the panel, switching the positions "off
> > / low sens / high sens". It can be operated cautiously, but should be
> > protected some way.
> >
> > Finally I don't like the volume wheel. (Gain control??) It seems as
> > if it is a log. or even lin. double potentiometer in the gain
> > circuit. So for the first 80% of it, very little happens, - then
> > comes all of it. The one in my sample is also badly linked, so one
> > channel go from left to right and then back again.
> > On the other hand, this "volume" could be at maximum all the time,
> > then setting the levels at the recorder.
> >
> > I don't know what happens if you short the output to ground, neither
> > what happens if you turn the 9v battery the wrong way, which seems to
> > be possible.
> >
> > For the ones who have better pip mic's than the recorder input, I say
> > that this amp is worth 159 dollars. You get rid of the self noise!
> > 259 is in my opinion too much, but I realize the problem. "Made in
> > China" it would cost 39.99  at Radio Shack... Life is terrible.
> >
> > Klas.
> >
> >
> >
> >
> > Telinga Microphones, Botarbo,
> > S-748 96 Tobo, Sweden.
> > Phone & fax int + 295 310 01
> > email: 
> > website: www.telinga.com
> >
> >
> >
>
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>

Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email: 
website: www.telinga.com







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